package com.example.myfilterlistener;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import java.io.IOException;

/**
 * Created by Administrator on 2017/1/10 0010.
 */


/**
 *
 * 使用注解标注过滤器
 * @WebFilter将一个实现了javax.servlet.Filter接口的类定义为过滤器
 * 属性filterName声明过滤器的名称,可选
 * 属性urlPatterns指定要过滤的URL模式,也可使用属性value来声明.(指定要过滤的URL模式是必选属性)
 * @author Angel(QQ:412887952)
 * @version v.0.1
 */
@WebFilter(filterName="myFilter",urlPatterns="/*")
public class MyFilter  implements Filter {

    @Override
    public void init(FilterConfig config) throws ServletException {
        System.out.println("myFilter过滤器初始化");
    }


    @Override
    public void doFilter(ServletRequest request, ServletResponse response,
                         FilterChain chain) throws IOException, ServletException {
        System.out.println("myFilter执行过滤操作");
        chain.doFilter(request, response);
    }

    @Override
    public void destroy() {
        System.out.println("myFilter过滤器销毁");
    }
}
